Shower valve



FIG. 1 is a front, left and bottom perspective view of a shower valve, showing my new design;

FIG. 2 is a rear, right and top perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines shown in the drawings illustrate portions of the shower valve that form no part of the claimed design. 

CLAIM The ornamental design for a shower valve, as shown and described. 